v3.25.4
Label Element Value
First Eagle Small Cap Opportunity Fund | First Eagle Small Cap Opportunity Fund  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk/Return [Heading] oef_RiskReturnHeading First Eagle Small Cap Opportunity Fund
Objective [Heading] oef_ObjectiveHeading Investment Objective
Objective, Primary [Text Block] oef_ObjectivePrimaryTextBlock

First Eagle Small Cap Opportunity Fund (“Small Cap Fund” or the “Fund”) seeks long-term growth of capital.
Expense Heading [Optional Text] oef_ExpenseHeading Fees and Expenses of the Small Cap Fund
Expense Narrative [Text Block] oef_ExpenseNarrativeTextBlock

The following information describes the fees and expenses you may pay if you buy, hold and sell shares of the Small Cap Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.

You may qualify for sales charge discounts if you, together with certain related accounts, invest, or agree to invest in the future, at least $25,000 in the Small Cap Fund. Information about these and other discounts is available from your financial professional and in the How to Purchase Shares and Public Offering Price of Class A Shares sections on pages 210 and 217, respectively, and in the appendix to this Prospectus titled Intermediary-Specific Front-End Sales Load and Waiver Terms.
Shareholder Fees Caption [Optional Text] oef_ShareholderFeesCaption Shareholder Fees (fees paid directly from your investment)
Operating Expenses Caption [Optional Text] oef_OperatingExpensesCaption Annual Fund Operating Expenses (expenses you pay each year as a percentage of the value of your investment)
Fee Waiver or Reimbursement over Assets, Date of Termination oef_FeeWaiverOrReimbursementOverAssetsDateOfTermination Feb. 28, 2027
Expenses Deferred Charges [Text Block] oef_ExpensesDeferredChargesTextBlock A contingent deferred sales charge of 1.00% may apply on certain redemptions of Class A shares made within 18 months following a purchase of $1,000,000 or more without an initial sales charge.
Expense Breakpoint Discounts [Text] oef_ExpenseBreakpointDiscounts You may qualify for sales charge discounts if you, together with certain related accounts, invest, or agree to invest in the future, at least $25,000 in the Small Cap Fund.
Expense Breakpoint, Minimum Investment Required [Amount] oef_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 25,000
Expense Example [Heading] oef_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] oef_ExpenseExampleNarrativeTextBlock

The following example is intended to help you compare the cost of investing in the Small Cap Fund with the cost of investing in other mutual funds. This hypothetical example assumes you invest $10,000 in the Fund for the time periods indicated and then either redeem or do not redeem all shares at the end of those periods. The example also assumes the average annual return is 5% and operating expenses remain the same (except that the fee waiver is taken into account only for the one-year expense example). Please keep in mind your actual costs may be higher or lower.
Portfolio Turnover [Heading] oef_PortfolioTurnoverHeading Portfolio Turnover Rate
Portfolio Turnover [Text Block] oef_PortfolioTurnoverTextBlock

The Small Cap Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example above, affect the Fund’s performance. During the most recent fiscal year, the Small Cap Fund’s portfolio turnover rate was 47.31% of the average value of its portfolio.
Portfolio Turnover, Rate oef_PortfolioTurnoverRate 47.31%
Strategy [Heading] oef_StrategyHeading Principal Investment Strategies
Strategy Narrative [Text Block] oef_StrategyNarrativeTextBlock

The Fund invests, under normal circumstances, in equity securities of small-and micro-cap companies in an attempt to take advantage of what the Adviser believes are opportunistic situations for undervalued securities. Normally, the Fund invests at least 80% of its net assets (plus any borrowings for investment purposes) in the equity securities (e.g., common stocks, warrants and rights), including hybrid securities (e.g., preferred stocks and convertible securities), of small-cap companies. The Adviser defines small-cap companies as those that have at the time of investment a market capitalization not greater than that of the largest company in the Russell 2000® Index. The Russell 2000® Index is reconstituted annually. Within small-cap, the Adviser further defines micro-cap companies as those that have at the time of investment a market capitalization not greater than that of the largest company in the Russell Microcap® Index. The Russell Microcap® Index is reconstituted annually.

Small-cap companies and micro-cap companies may have similar commercial characteristics (e.g., developing or marketing new products or services for which markets are not yet established). They differ, however, in the market value of their outstanding shares (i.e., market capitalization) with micro-cap companies having smaller market capitalizations than small-cap companies.

Potential investments that the Adviser considers to be opportunistic may include situations involving company turnarounds (e.g., a company that may be experiencing periods of poor financial or stock performance but may be exhibiting potential for financial recovery), emerging growth companies with interrupted earnings patterns (e.g., companies without a long or consistent history of earnings but that the Adviser believes have the potential for earnings growth), companies with unrecognized asset values, or undervalued growth companies (e.g., companies that have low multiples of price-to-book or price-to-sales ratios, or companies with securities that are trading at a price below what the Adviser believes the security is worth). In certain market environments, the Fund may invest up to 10% of its net assets (plus any borrowings for investment purposes and measured at the time of investment) in securities of foreign issuers.

The Fund may invest in other investment companies that invest in equity securities. The Fund may sell securities to, among other things, secure gains, limit losses, redeploy assets into what the Adviser deems to be more promising opportunities, and/or manage cash levels in the Fund’s portfolio.

For more information about the Small Cap Fund’s principal investment strategies, please see the More Information about the Funds’ Investments section.
Bar Chart and Performance Table [Heading] oef_BarChartAndPerformanceTableHeading Investment Results
Performance Narrative [Text Block] oef_PerformanceNarrativeTextBlock

The following information provides an indication of the risks of investing in the Small Cap Fund by showing changes in the Fund’s performance from year to year, and by showing how the Fund’s average annual returns for the periods shown compare with those of one or more broad measures of market performance, which have characteristics relevant to the Fund’s investment strategy. The Fund also compares its performance to the S&P 500 Index, which represents the overall applicable equity market. The indices are described in the Fund Indices section. As with all mutual funds, past performance is not an indication of future performance (before or after taxes).

After-tax returns are calculated using the highest individual U.S. federal income tax rate for each year, and do not reflect the effect of state and local taxes. Actual after-tax returns depend on your individual tax situation. After-tax returns are not relevant to investors in tax-deferred accounts, such as 401(k) plans or individual retirement accounts.

Updated performance information is available at www.firsteagle.com/funds/small-cap-opportunity-fund or by calling 800.334.2143. As with all mutual funds, past performance is not an indication of future performance (before or after taxes).

The following bar chart assumes reinvestment of dividends and distributions and does not reflect any sales charges. If sales charges were included the returns would be lower.
Performance Information Illustrates Variability of Returns [Text] oef_PerformanceInformationIllustratesVariabilityOfReturns The following information provides an indication of the risks of investing in the Small Cap Fund by showing changes in the Fund’s performance from year to year, and by showing how the Fund’s average annual returns for the periods shown compare with those of one or more broad measures of market performance, which have characteristics relevant to the Fund’s investment strategy.
Performance Availability Phone [Text] oef_PerformanceAvailabilityPhone 800.334.2143
Performance Availability Website Address [Text] oef_PerformanceAvailabilityWebSiteAddress www.firsteagle.com/funds/small-cap-opportunity-fund
Performance Past Does Not Indicate Future [Text] oef_PerformancePastDoesNotIndicateFuture As with all mutual funds, past performance is not an indication of future performance (before or after taxes).
Bar Chart [Heading] oef_BarChartHeading Calendar Year Total Returns—Class I
Bar Chart Does Not Reflect Sales Loads [Text] oef_BarChartDoesNotReflectSalesLoads The following bar chart assumes reinvestment of dividends and distributions and does not reflect any sales charges. If sales charges were included the returns would be lower.
Bar Chart Closing [Text Block] oef_BarChartClosingTextBlock

 

 

 

 

 

 

 

 

 

Best Quarter*

 

 

  

Worst Quarter*

Third Quarter 2025

  

13.04%

  

 

  

Second Quarter 2022

  

-18.21%

 

 

 

 

 
 

*

  

For the period presented in the bar chart above.
Highest Quarterly Return, Label [Optional Text] oef_HighestQuarterlyReturnLabel Best Quarter
Highest Quarterly Return, Date oef_BarChartHighestQuarterlyReturnDate Sep. 30, 2025
Highest Quarterly Return oef_BarChartHighestQuarterlyReturn 13.04%
Lowest Quarterly Return, Label [Optional Text] oef_LowestQuarterlyReturnLabel Worst Quarter
Lowest Quarterly Return, Date oef_BarChartLowestQuarterlyReturnDate Jun. 30, 2022
Lowest Quarterly Return oef_BarChartLowestQuarterlyReturn (18.21%)
Index No Deduction for Fees, Expenses, or Taxes [Text] oef_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees or expenses, but reflects net of withholding taxes)
Performance Table Uses Highest Federal Rate oef_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the highest individual U.S. federal income tax rate for each year, and do not reflect the effect of state and local taxes.
Performance Table Not Relevant to Tax Deferred oef_PerformanceTableNotRelevantToTaxDeferred Actual after-tax returns depend on your individual tax situation. After-tax returns are not relevant to investors in tax-deferred accounts, such as 401(k) plans or individual retirement accounts.
Performance Table One Class of after Tax Shown [Text] oef_PerformanceTableOneClassOfAfterTaxShown The following table discloses after-tax returns only for Class I shares. After-tax returns for Class A, Class C and Class R6 shares will vary.
Performance Table Narrative oef_PerformanceTableNarrativeTextBlock

The following table discloses after-tax returns only for Class I shares. After-tax returns for Class A, Class C and Class R6 shares will vary. While no information is shown for Class C shares (because it is more recently organized), annual returns for Class C shares would have been substantially similar to those shown here. The annual returns differ only to the extent that Class C shares do not have the same expenses as the classes for which performance is shown. Comparative expense information is in the Fees and Expenses table.
Average Annual Return, Caption [Optional Text] oef_AverageAnnualReturnCaption Average Annual Total Returns as of December 31, 2025
First Eagle Small Cap Opportunity Fund | First Eagle Small Cap Opportunity Fund | Risk Not Insured [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

An investment in the Fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency.
First Eagle Small Cap Opportunity Fund | First Eagle Small Cap Opportunity Fund | Risk Lose Money [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock As with any mutual fund investment, you may lose money by investing in the Small Cap Fund.
First Eagle Small Cap Opportunity Fund | First Eagle Small Cap Opportunity Fund | Market Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Market Risk — The value and liquidity of the Fund’s portfolio holdings may fluctuate in response to events specific to the issuers or markets in which the Fund invests, as well as economic, political, or social events in the United States or abroad. Markets may be volatile, and prices of individual securities and other investments, including those of a particular type, may decline significantly and rapidly in response to adverse issuer, political, regulatory, market, economic or other developments, public perceptions concerning these developments, and adverse investor sentiment or publicity. Recent market conditions and events, including a global public health crisis, wars and armed conflicts and actions taken by governments in response, may exacerbate volatility. Rapid changes in prices or liquidity, which often are not anticipated and can relate to events not connected to particular investments, may limit the ability of the Fund to dispose of its assets at the price or time of its choosing and can result in losses. Changes in prices may be temporary or may last for extended periods.
First Eagle Small Cap Opportunity Fund | First Eagle Small Cap Opportunity Fund | Small-Size Company Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Small-Size Company Risk — The Fund will invest in small-size companies, the securities of which can be more volatile in price than those of larger companies. Positions in small-size companies, especially when the Fund is a larger holder of a small company’s securities, also may be more difficult or expensive to trade.
First Eagle Small Cap Opportunity Fund | First Eagle Small Cap Opportunity Fund | Micro-Size Company Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Micro-Size Company Risk — The Fund will invest in micro-size companies, the securities of which can be more volatile in price than those of larger and small-size companies. Positions in micro-size companies, especially when the Fund is a larger holder of a micro-size company’s securities, also may be more difficult or expensive to trade.
First Eagle Small Cap Opportunity Fund | First Eagle Small Cap Opportunity Fund | Equity Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Equity Risk — The value of the Fund’s portfolio holdings may fluctuate in response to the risk that the prices of equity securities, including common stock, rise and fall daily. These price movements may result from factors affecting individual companies, industries or the securities market as a whole. In addition, equity markets tend to move in cycles, which may cause stock prices to fall over short or extended periods of time. Equity securities generally have greater price volatility than debt securities.
First Eagle Small Cap Opportunity Fund | First Eagle Small Cap Opportunity Fund | Convertible Security Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Convertible Security Risk — Convertible securities generally offer lower interest or dividend yields than non-convertible securities of similar quality. Convertible securities may gain or lose value due to changes in the issuer’s operating results, financial condition, credit rating and changes in interest rates and other general economic, industry and market conditions.
First Eagle Small Cap Opportunity Fund | First Eagle Small Cap Opportunity Fund | Preferred Stock Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Preferred Stock Risk — The Fund may invest in preferred stock. Unlike common stock, preferred stock generally pays a fixed dividend from a company’s earnings and may have a preference over common stock on the distribution of a company’s assets in the event of bankruptcy or liquidation. Preferred stockholders’ liquidation rights are subordinate to the company’s debt holders and creditors. If interest rates rise, the fixed dividend on preferred stocks may be less attractive and the price of preferred stocks may decline.
First Eagle Small Cap Opportunity Fund | First Eagle Small Cap Opportunity Fund | Warrants and Rights Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Warrants and Rights Risk — The Fund may invest in warrants and rights. Warrants and rights can provide a greater potential for profit or loss than an equivalent investment in the underlying security. Prices of warrants and rights do not necessarily move in tandem with the prices of the underlying securities and therefore are highly volatile and speculative investments.
First Eagle Small Cap Opportunity Fund | First Eagle Small Cap Opportunity Fund | Foreign Investment Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Foreign Investment Risk — The Fund may invest in foreign investments (including American Depositary Receipts (“ADRs”), Global Depositary Receipts (“GDRs”) and European Depositary Receipts (“EDRs”)). Foreign investments, which can be denominated in any applicable foreign currency, are susceptible to less politically, economically and socially stable environments, foreign currency and exchange rate changes, and adverse changes to government regulations. While depositary receipts provide an alternative to directly purchasing the underlying foreign securities in their respective national markets and currencies, investments in ADRs, GDRs and EDRs continue to be subject to many of the risks associated with investing directly in foreign investments. The Fund’s investments may subject it to the risks associated with investing in the European markets, including the risks associated with the United Kingdom’s exit from the European Union (“Brexit”) and the war in Ukraine. The impact of Brexit on the United Kingdom and European economies could be significant, potentially resulting in increased volatility and illiquidity and lower economic growth for companies that rely significantly on the United Kingdom and/or Europe for their business activities and revenues. Any further exits from the European Union, or an increase in the belief that such exits are likely or possible, would likely cause additional market disruption globally and introduce new legal and regulatory uncertainties. Recent political developments in the United States have raised potential implications for the current trade arrangements between the United States and Europe, which could negatively affect the value of European

 

 

 

securities. Additionally, dividends and interest received by the Fund and capital gains recognized by the Fund may give rise to withholding and other taxes imposed by foreign countries and may decrease the Fund’s return.
First Eagle Small Cap Opportunity Fund | First Eagle Small Cap Opportunity Fund | Currency Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Currency Risk — Currency risk is the risk that foreign currencies will decline in value relative to that of the U.S. dollar and affect the Fund’s non-U.S. currencies or securities that trade in and receive revenue in non-U.S. currencies.
First Eagle Small Cap Opportunity Fund | First Eagle Small Cap Opportunity Fund | Other Investment Company Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Other Investment Company Risk — To the extent the Fund invests in other investment companies, including money market funds and exchange-traded funds (“ETFs”), its performance will be affected by the performance of those other investment companies. Investments in other investment companies are subject to the risks of the other investment companies’ investments. In addition, the Fund will pay a proportional share of the fees and expenses of the other investment companies in addition to its own fees and expenses and, as a result, shareholders will be subject to two layers of fees and expenses.
First Eagle Small Cap Opportunity Fund | First Eagle Small Cap Opportunity Fund | Cybersecurity Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Cybersecurity Risk — The occurrence of a disaster such as a cyber-attack, a natural catastrophe, an industrial accident, a terrorist attack or war, events unanticipated in the disaster recovery systems of the Fund and Adviser, or a support failure from external providers, could have an adverse effect on the Fund’s ability to conduct business and on its results of operations and financial condition, particularly if those events affect the Fund and/or the Adviser’s computer-based data processing, transmission, storage, and retrieval systems or destroy data.
First Eagle Small Cap Opportunity Fund | First Eagle Small Cap Opportunity Fund | Value Investment Strategy Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Value Investment Strategy Risk — “Value” investments, as a category, or entire industries or sectors associated with such investments, may lose favor with investors as compared to those that are more “growth” oriented. In such an event, the Fund’s investment returns would be expected to lag relative to returns associated with more growth-oriented investment strategies. Investing in or having exposure to “value” securities presents the risk that such securities may never reach what the Adviser believes are their full market values.
First Eagle Small Cap Opportunity Fund | First Eagle Small Cap Opportunity Fund | Class R6  
Prospectus [Line Items] oef_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00%
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.85% [1]
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.00%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.08%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.93%
Fee Waiver or Reimbursement oef_FeeWaiverOrReimbursementOverAssets 0.00% [1]
Net Expenses (as a percentage of Assets) oef_NetExpensesOverAssets 0.93%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 95
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 296
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 515
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 1,143
Expense Example, No Redemption, 1 Year oef_ExpenseExampleNoRedemptionYear01 95
Expense Example, No Redemption, 3 Years oef_ExpenseExampleNoRedemptionYear03 296
Expense Example, No Redemption, 5 Years oef_ExpenseExampleNoRedemptionYear05 515
Expense Example, No Redemption, 10 Years oef_ExpenseExampleNoRedemptionYear10 $ 1,143
First Eagle Small Cap Opportunity Fund | First Eagle Small Cap Opportunity Fund | Class A  
Prospectus [Line Items] oef_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 5.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 1.00% [2]
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.85% [1]
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.14%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 1.24%
Fee Waiver or Reimbursement oef_FeeWaiverOrReimbursementOverAssets 0.00% [1]
Net Expenses (as a percentage of Assets) oef_NetExpensesOverAssets 1.24%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 620
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 874
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 1,147
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 1,925
Expense Example, No Redemption, 1 Year oef_ExpenseExampleNoRedemptionYear01 620
Expense Example, No Redemption, 3 Years oef_ExpenseExampleNoRedemptionYear03 874
Expense Example, No Redemption, 5 Years oef_ExpenseExampleNoRedemptionYear05 1,147
Expense Example, No Redemption, 10 Years oef_ExpenseExampleNoRedemptionYear10 $ 1,925
First Eagle Small Cap Opportunity Fund | First Eagle Small Cap Opportunity Fund | Class I  
Prospectus [Line Items] oef_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00%
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.85% [1]
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.00%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.18%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 1.03%
Fee Waiver or Reimbursement oef_FeeWaiverOrReimbursementOverAssets (0.03%) [1]
Net Expenses (as a percentage of Assets) oef_NetExpensesOverAssets 1.00%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 102
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 325
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 566
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 1,257
Expense Example, No Redemption, 1 Year oef_ExpenseExampleNoRedemptionYear01 102
Expense Example, No Redemption, 3 Years oef_ExpenseExampleNoRedemptionYear03 325
Expense Example, No Redemption, 5 Years oef_ExpenseExampleNoRedemptionYear05 566
Expense Example, No Redemption, 10 Years oef_ExpenseExampleNoRedemptionYear10 $ 1,257
First Eagle Small Cap Opportunity Fund | First Eagle Small Cap Opportunity Fund | Class C  
Prospectus [Line Items] oef_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 1.00%
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.85% [1]
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.15%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 2.00%
Fee Waiver or Reimbursement oef_FeeWaiverOrReimbursementOverAssets 0.00% [1]
Net Expenses (as a percentage of Assets) oef_NetExpensesOverAssets 2.00%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 303
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 627
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 1,078
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 2,327
Expense Example, No Redemption, 1 Year oef_ExpenseExampleNoRedemptionYear01 203
Expense Example, No Redemption, 3 Years oef_ExpenseExampleNoRedemptionYear03 627
Expense Example, No Redemption, 5 Years oef_ExpenseExampleNoRedemptionYear05 1,078
Expense Example, No Redemption, 10 Years oef_ExpenseExampleNoRedemptionYear10 $ 2,327
First Eagle Small Cap Opportunity Fund | Russell 2000® Index (reflects no deduction for fees or expenses, but reflects net of withholding taxes)  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 12.81%
Average Annual Return, Percent oef_AvgAnnlRtrPct 3.02%
Average Annual Return, Percent oef_AvgAnnlRtrPct 3.78%
First Eagle Small Cap Opportunity Fund | Russell 2000® Value Index (reflects no deduction for fees or expenses, but reflects net of withholding taxes)  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 12.59%
Average Annual Return, Percent oef_AvgAnnlRtrPct 4.28%
Average Annual Return, Percent oef_AvgAnnlRtrPct 5.03%
First Eagle Small Cap Opportunity Fund | S&P 500 Index (reflects no deduction for fees, expenses or taxes)  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 17.88%
Average Annual Return, Percent oef_AvgAnnlRtrPct 12.54%
Average Annual Return, Percent oef_AvgAnnlRtrPct 13.79%
First Eagle Small Cap Opportunity Fund | Class R6  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 13.40%
Average Annual Return, Percent oef_AvgAnnlRtrPct 3.88%
Performance Inception Date oef_PerfInceptionDate Jul. 01, 2021
First Eagle Small Cap Opportunity Fund | Class A  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 7.42%
Average Annual Return, Percent oef_AvgAnnlRtrPct 2.42%
Performance Inception Date oef_PerfInceptionDate Jul. 01, 2021
First Eagle Small Cap Opportunity Fund | Class I  
Prospectus [Line Items] oef_ProspectusLineItems  
Annual Return [Percent] oef_AnnlRtrPct (14.05%)
Annual Return [Percent] oef_AnnlRtrPct 16.76%
Annual Return [Percent] oef_AnnlRtrPct 6.49%
Annual Return [Percent] oef_AnnlRtrPct 13.33%
Average Annual Return, Percent oef_AvgAnnlRtrPct 13.33%
Average Annual Return, Percent oef_AvgAnnlRtrPct 4.37%
Performance Inception Date oef_PerfInceptionDate Apr. 27, 2021
First Eagle Small Cap Opportunity Fund | Class I | After Taxes on Distributions  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 13.01%
Average Annual Return, Percent oef_AvgAnnlRtrPct 4.01%
First Eagle Small Cap Opportunity Fund | Class I | After Taxes on Distributions and Sales  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 8.05%
Average Annual Return, Percent oef_AvgAnnlRtrPct 3.27%
[1] First Eagle Investment Management, LLC (the “Adviser”) has contractually agreed to waive and/ or reimburse certain fees and expenses of Classes A, C, I and R6 so that the total annual operating expenses (excluding interest charges on any borrowings, taxes, brokerage commissions and other expenses incurred in placing orders for the purchase and sale of securities and other investment instruments, acquired fund fees and expenses, dividend and other expenses relating to short sales, and extraordinary expenses, if any) (“annual operating expenses”) of each class are limited to 1.25%, 2.00%, 1.00% and 1.00% of average net assets, respectively. Each of these undertakings lasts until February 28, 2027 and may not be terminated during its term without the consent of the Board of Trustees. The Fund has agreed that each of Classes A, C, I and R6 will repay the Adviser for fees and expenses waived or reimbursed for the class provided that repayment does not cause annual operating expenses (after the repayment is taken into account) to exceed the lesser of: (1) 1.25%, 2.00%, 1.00% and 1.00% of the class’ average net assets, respectively; or (2) if applicable, the then-current expense limitations. Any such repayment must be made within three years after the year in which the Adviser incurred the expense.
[2] A contingent deferred sales charge of 1.00% may apply on certain redemptions of Class A shares made within 18 months following a purchase of $1,000,000 or more without an initial sales charge.